Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10316/4770
Título: | Phytochemical and antioxidant characterization of Hypericum perforatum alcoholic extracts | Autor: | Silva, Bruno A. Ferreres, Federico Malva, João O. Dias, Alberto C. P. |
Palavras-chave: | Hypericum perfortum; Phenolics; Flavonoids; Antioxidant activity; Lipid peroxidation inhibition | Data: | 2005 | Citação: | Food Chemistry. 90:1-2 (2005) 157-167 | Resumo: | The antioxidant potentials of a total ethanolic extract of Hypericum perforatum (TE) and fractions were evaluated and correlated with their phenolic contents. The extracts were fully characterised by HPLC-DAD-MS-MS. Kaempferol 3-rutinoside and rutin-acetyl were identified for the first time in TE extracts. The free radical-scavenging properties of TE (EC50=21 [mu]g dwb/ml) and fractions were studied using DPPH. Fractions containing flavonoids and/or caffeoylquinic acids were found to be the main contributors to the free radical-scavenging activity of the TE. Lipid peroxidation, induced with ascorbate/Fe2+, was significantly reduced in the presence of the TE (EC50=26 [mu]g dwb/ml) and fractions containing flavonoids and/or caffeoylquinic acids. The fraction containing flavonoid aglycones was found to be responsible for a major part of the TE protection against lipid peroxidation. Hypericins and hyperforins made no significant contributions to the antioxidant properties of TE. Human consumption of H. perforatum extract or fractions could be beneficial. | URI: | https://hdl.handle.net/10316/4770 | DOI: | 10.1016/j.foodchem.2004.03.049 | Direitos: | openAccess |
Aparece nas coleções: | FMUC Medicina - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
filede9007ddad714c57bade404ee6ce841a.pdf | 244.98 kB | Adobe PDF | Ver/Abrir |
Citações SCOPUSTM
334
Visto em 7/out/2024
Citações WEB OF SCIENCETM
50
290
Visto em 2/out/2024
Visualizações de página 50
532
Visto em 15/out/2024
Downloads 20
1.676
Visto em 15/out/2024
Google ScholarTM
Verificar
Altmetric
Altmetric
Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.